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MongoDB & Node.js: Change Streams & Triggers (Part 4 of 4)

Published May 21, 2021
JavaScript
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When you need to react immediately to changes in your MongoDB database, change streams and triggers can help you make that happen. In part four of this quick start tutorial for beginners, Lauren Schaefer explains three ways to monitor change streams in a Node.js script: using EventEmitter's on(), using ChangeStream's hasNext(), and using Node's Stream API. She also explains how to create triggers in MongoDB Atlas. Chapters: 00:00 Intro 00:57 Change Streams 03:52 Monitoring Change Streams Using EventEmitter's on() 12:21 Monitoring Change Streams Using ChangStream's hasNext() 16:37 Monitoring Change Streams Using the Stream API 19:57 Resuming Change Streams 21:43 Triggers 27:16 Wrapping Up Links Lauren mentions in the video: Lauren's blog post: Change Streams & Triggers with Node.js Tutorial https://developer.mongodb.com/quickstart/nodejs-change-streams-triggers Lauren's GitHub repo with the code from this video https://github.com/mongodb-developer/nodejs-quickstart/blob/master/changeStreams.js Node.js & MongoDB Starter Template File https://github.com/mongodb-developer/nodejs-quickstart/blob/master/template.js Other videos in this tutorial series: Part 1: https://youtu.be/fbYExfeFsI0 Part 2: https://youtu.be/iz37fDe1XoM Part 3: https://youtu.be/bdS03tgD2QQ Connect with Lauren: Twitter: https://twitter.com/lauren_schaefer​ TikTok: https://tiktok.com/@lauren_schaefer​ Linkedin: https://www.linkedin.com/in/laurenjan...​ MongoDB Community: https://developer.mongodb.com/community/forums/t/hey-friends-im-lauren/168/ Subscribe to MongoDB ►►► https://bit.ly/3bpg1Z1 Connect with MongoDB: Website: https://bit.ly/2LjtNBZ Twitter: https://bit.ly/3fH87gR Facebook: https://bit.ly/3fEaIsd Linkedin: https://bit.ly/2SY9w90 Instagram: https://bit.ly/3bn9bDv Community Forums: https://bit.ly/2I8VCi5 TikTok: https://bit.ly/3fHoqdJ
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